Update grafonnet submodule

[o-farooq]

Description

Grafonnet submodule is not updated , we are trying to use addOverride functionality of statPanel which was added later

Relevant issues/tickets

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• This change requires a documentation update
• I have added tests that prove my fix is effective or that my feature works
• I have added a test case that will be used to verify my changes
• Verified independently on a cluster by reviewer

[pb82]

@o-farooq thanks!